Please help this is for my geometry math class! I don't understand how to get thia answer I think it has somthing to do with a distance formula or a midpoint formula if u can't help please don't answer I don't want to fail the class!

Please help this is for my geometry math class I dont understand how to get thia answer I think it has somthing to do with a distance formula or a midpoint form class=
Please help this is for my geometry math class I dont understand how to get thia answer I think it has somthing to do with a distance formula or a midpoint form class=